Controlling Griffin's RocketFM under Linux (rocket.c)

I'm using modified version of Michael Rolig’s shark.c (original mirror)application to control my RocketFM from Linux and I released the new tool rocket.c. Hidapi version: rocket_hidapi.c Owners of Griffin's RocketFM now can control this little FM transmitter under Linux.

Avaliable options:

Changing frequency from 88.1 to 107.9 Mhz (but You can use range from 70 to 120 Mhz).

This is awesome! Exactly what I was looking for. Is there anything special I need to do to stop using the RocketFM transmitter? Say I'm using it and I decide I want to use my computer speakers or the line out. Do I just unplug the RocketFM from the USB port? I'm guessing I'd at least need to switch my software music player to a different output device. Thanks!